//Use the array methods slice and splice to copy each element of the first array into the second array, in order.Begin inserting elements at index n of the second array.The input arrays should remain the same after the function runs.

function array( arr1, arr2, n ) {
  let array2 = arr2.slice()
  array2.splice( n, 0, ...arr1 )
  return array2;
}
console.log( array( [ 3, 4 ], [ 2, 5, 6, 7, 8 ], 1 ) )
console.log( array( [ 1, 2 ], [ "a", "b" ], 2 ) )

//slice() method to create a copy of arr2 so not to mutate original array
//splice() to alter array and add the arr1 contents into array2 at starting index n, and not to delete any elements next arg is 0
